Hello,
Without examination, confirmation of a diagnosis is tough but it can be contact dermatitis, rash due to friction rub,folliculitis, cyst or genital wart(caused by HPV infection).
Apply warm compresses, Neosporin ointment and calamine lotion and avoid messing with it. You can take anti-inflammatory pain killers like ibuprofen or acetaminophen. If the lump persists then it will be best to get it evaluated from a dermatologist.
I hope it helps. Take care and regards.
Hello there just curious as to how the internal lump on your penis has healed or if things are ok with you. I too have the same problem diagnosed from my doctor and recommended to me to have it surgically removed. i dont like the idea and looking at other ways to deal with it. if anyone has any suggestions or answers be much appreciated :(......